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ASTM A232 Spring Steel vs. S17400 Stainless Steel

Both ASTM A232 spring steel and S17400 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM A232 spring steel and the bottom bar is S17400 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 540
280 to 440
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
11 to 21
Fatigue Strength, MPa 1040
380 to 670
Poisson's Ratio 0.29
0.28
Reduction in Area, % 46
40 to 62
Shear Modulus, GPa 73
75
Shear Strength, MPa 1090
570 to 830
Tensile Strength: Ultimate (UTS), MPa 1790
910 to 1390
Tensile Strength: Yield (Proof), MPa 1610
580 to 1250

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
850
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
14
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.7
Embodied Energy, MJ/kg 28
39
Embodied Water, L/kg 51
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
140 to 160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 64
32 to 49
Strength to Weight: Bending, points 42
27 to 35
Thermal Diffusivity, mm2/s 14
4.5
Thermal Shock Resistance, points 53
30 to 46

Alloy Composition

Carbon (C), % 0.48 to 0.53
0 to 0.070
Chromium (Cr), % 0.8 to 1.1
15 to 17
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 96.8 to 97.7
70.4 to 78.9
Manganese (Mn), % 0.7 to 0.9
0 to 1.0
Nickel (Ni), % 0
3.0 to 5.0
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030
Vanadium (V), % 0.15 to 0.3
0